Sharpening-machine.



A. M. MGLE'RAN.

SHARPENING MACHINE. APPLIGATION FILED MK. 7, 1907.

Patented Jan. 12, 1909.

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A. M. MGLERAN- SHARPENING MACHINE.

APPLICATION rum) MAR. 7, 1907.

Patented Jan. 12, 1909.

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ALVORD M. MCLERAN, OF KANSAS CITY, MISSOURI, ASSIGNOB TO TWO EDGE MFG. CO.

SHARPE NING-MACHINE Application filed March '7, 1907.

To all whom it may concern:

Be it known that I, ALvonD M. MOLERAN, a citizen of the United States, residing at Kansas City, in the county of Jackson and State of Missouri, have invented certain new and useful Improvements in Sharp ening- Machines, of which the following is a specification.

My invention relates to improvements in sharpening-machines, and is an improvement over the machine for which United States Letters Patent #822,070 were granted to me on the 29th day of May 1906.

The present invention embodies certain novel features whereby the cost of production is materially decreased and greater stability is obtained.

The machine consists almost entirely of die and cast work combined in such manner as to practically eliminate all screw-threads, riveting and machine work, and resulting in a reduction of the number of separate parts necessary to handle when putting the machine together.

In the accompanying drawings, which illustrate the invention, Figure 1 represents a side elevation of my sharpening-machine. Fig. 2 is a rear elevation of the same. Fig. 3 is an irregular vertical section on line IIIIII of Fig. 1. Fig. 4 is a broken side elevation of the sharpening-wheel and frame with a modified form of gage secured to the latter. Fig. 5 is an end view of same with the gage and frame in section on line V-V of Fig. 4. Fig. 6 is a broken end view of the sharpening-Wheel and frame with a modified form of gage. Fig. 7 is a section of same on line VII-VII of Fig. 6.

In carrying out the invention I employ a base plate 1, upon which the frame of the sharpening machine is mounted, said frame having outturned lugs 2 secured to the top of the base by bolts and retaining nuts 3 and 1, respectively. Said frame consists of a pair of side members 5, united at their rear ends by a rear member 6 and connected at their forward ends by a main shaft 7 and a counter-shaft 8, which are adjustably secured to the frame by screws 9 10, extending through openings 11 12, respectively. By thus adjustably mounting said shafts they may be placed parallel to each other so that the gearing hereinafter described will operate with the least possible friction. Screw 9 extends through a pair of washers 13 laced on opposite sides of opening 11, so t at the screw Specification of Letters Patent.

Patented Jan. 12, 1909.

Serial No. 361,113.

will bear against one of said washers, while one end of shaft 7 bears against its companion.

The sharpening-wheel comprises a metallic core 14, an annular rim of abrasive material 15 extending around the core, and a sleeve 16 extending through the central portion of the core. The abrasive material 15 projects on opposite sides of the core to form grinding surfaces 17 as shown in Fig. Sleeve 16 is preferably, cast in the core and has a reduced extension 18 at one end upon which a pinion 19 is fixed. Said pinion forms one of a train of gear wheels including a large cog-wheel 2O intermeshing with the pinion, a pinion 21 journaled upon shaft 7, and carrying cog-wheel 20, a large cog-wheel 22 intermeshing with pinion 21 and fixed to a second. pinion 23 journaled upon shaft 8, and a drive-wheel 24 fixed upon a sleeve 25, journaled upon shaft 7 and mounted in a bearing 26 cast to the adjacent side member of the frame. The outer end of sleeve 25 is rectangular in form and provided with a crank 27 detachably secured thereto by a washer 28. and a screw 29, which latter engages the adjacent end of shaft 7.

Cog-Wheels 20, 22 and 24 are preferably, stamped from sheet metal, while pinions 21, 23, and sleeve 25 are cast upon their respective cog-wheels, so as to avoid the time and expense of otherwise securing them together. Cog-wheels 2O 22 are duplicates, as are also pinions 21 23, hence it is obvious that crank 27 may be raised if desired by placing bear ing 26 in axial alinement with the present position of counter-shaft 8 and transposing shafts 7 and 8.

When grinding knives I employ a gage consisting of two members 30, having slots 31 at their rear ends for detachably engaging a plurality of lugs 32 stamped from the back of the frame. Members 30 extend forward and upward as shown in 1, their vertical portions being parallel with a vertical line drawn through the axis of the sharpeningwheel, as shown in Fig. 1, so that when grinding a knife the latter will have a central bearing. Hence the sharpening-wheel may be turned in either direction, without exerting undue tendency to draw the knife forward or backward. The vertical portions of members 30 have inner converging sides 33, which intersect the grinding surfaces 17 so that a knife, when being ground, will receive the proper bevel.

Figs. 4 and 5 show a modified form of gage for sharpening bevel-edged tools, which consists of an adjustable member 30 pivotally mounted upon a bolt 34 extending through a spacing-sleeve 35 and slidably mounted in a pair of slotted ears 36, fixed to a rightangle support 37, detachably secured to one of the side members of the frame by a bolt 38 and a thumb-nut 39. Member 30 is locked in any of its adjusted positions by a thumb-nut 40, engaging the threaded end of bolt 34 and adapted, with the aid of sleeve 35, to force ears 36 into frictional engagement with a pair of ears 41 on member 30 Figs. 6 and 7 show another modified form of gage consisting of a member 30, provided with slots 31 adapted to detachably engage lugs 32. Said gage has a long pair of upwardly extending members, having converging inner sides 33 which intersect the grinding surfaces 17. Gage 30 also has a short pair of members having diverging inner sides 33 extending at a greater angle to each other than sides 33. When grinding knives the gage is placed in the position shown in the drawing, but is reversed preparatory to grinding scissors, so that the latter may receive the proper bevel.

From the above description it is apparent that I have produced a machine which is compact in form, capable of a high rate of speed, and well adapted for the purposes intended.

Having thus described my invention, What I claim is:

1. In a sharpening-machine, a sharpeningwheel provided at its opposite sides with grinding surfaces, and reversible gage having two pairs of members with inner sides converging toward their lower ends and interseating said grinding surfaces, the converging sides of one pair of members extending at a greater angle toward each other than those of the other pair.

2. In a sharpening machine, a sharpening wheel, a frame in which the sharpening wheel is mounted, said frame having upturned lugs and a gage provided with slots through which said lugs are loosely engaged as supports.

3. In a sharpening machine, a sharpening wheel having a side face formed as a grinding surface and a stationary gage comprising a -working portion disposed adjacent to said grinding surface and having its axis coincident with a diameter of said wheel.

4. In a sharpening machine, a sharpening wheel having a side face formed as a grinding surface and a stationary gage comprising a working portion disposed in a plane at a right angle to the plane of said wheel, said working portion having its axis coincident with a diameter of said wheel and its inner edge inclined downwardly towards said wheel.

5. In a sharpening machine, a sharpening wheel having a side face formed as a grinding surface and a reversible gage comprising two working portions having gaging edges of different inclinations and means for adjustably positioning said gage with either of said working portions adjacent to said grinding surface.

6. In a sharpening machine, a sharpening wheel provided at its opposite sides with grinding surfaces, a supporting frame having upturned lugs and an adjustable gage comprising a body having slots to engage said lugs and members arranged in upper and lower pairs, said gage being adjustable to positions with the members of either of said pairs adjacent said grinding surfaces.

7. In a sharpening machine, a sharpening wheel including an annular abrasive part having its opposite side faces grinding surfaces, and a gage including a working portion disposed in a plane at an angle to the wheel, the said working portion having an inclined edge extending downwardly and intersecting the plane of the adjacent side face of the abrasive part.

8. In a sharpening machine, a sharpening wheel, a frame in which the sharpening wheel is mounted, said frame having upturned lugs adjacent one face thereof, and a gage includ ing a working portion cooperating with said wheel, and a body portion formed with slots through which said lugs are engaged as sup ports, said gage also having supporting con.- tact with the adjacent part of said frame.

In testimony whereof I affix my signature, in the presence of two witnesses.

ALVORD M. MOLERAN.

Witnesses:

F. G. FISCHER, M. Cox. 

